《机械制造专业英语》教案.doc

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1、Unit1EngineeringDrawing一、NewWords:Coordinatesystem:ThebasicofallinputAutoCADistheCartesiancoordinatesystem,andthevariousmethodofinput(absoluteorrelative)relyonthissystem.Coordinatevalue:坐标值Cartesiancoordinateaxes:笛卡尔坐标轴Perpendicularly：垂玄地Projection：投影Orthographicprojection：正投影1.1

2、coordinatesystemCAD=computer-aideddesignFixed:firmlyinposition;stationaryLocate:vt.TodeterminethepositionofPositiveandnegative:Illustrate:toexplainDrafting:n.制图1.2TypesofViewsAuxiliary:辅助视图Detail:n.详图；局部Derived:取得；由来Scaling:enlargescaleClarification:tomakeclearPlanar:tow-Ddrawing

3、Cross-section:横截面Datumplane:基准面Fig.1-3:Brushwithspring：F带弹簧的电刷Handle:手柄Needlebearing：滚针轴承Retainingring：扌肖圈Chuckspacer:夹头衬片-Key:销Symmetrical：对称的Configuration::结构1.3MultiviewdrawingengineeringdrawingisanabstractuniversallanguageusedtorepresentadesignerideatootherHomework:Page9:Exe

4、rcise:1.filltheblankswithaproperwordaccordingtothetext.二.TechnicalReadingThefollowingdiagramshowswhathappensinadisplacertypeStirlingengineduringoneworkingcycle.A.Thepowerpistonisinitslowestandthedisplacerinitshighestposition.Alltheworkinggasisinthecoldspace.B•Thedisplacerisstilli

5、nitshighestposition.Butthepowerpistonhasgoneupandcompressedthegasinthecoldspace.C•Thepowerpistonisnowinitsupperpositionandthedisplacerhaspushedthegasthroughthecooler,theregenerator,andtheheatingpipesintothehotspace.D.Thehotgasisbeingexpanded,andhestenergyisbeingtransformedintomec

6、hanicalenergyasthedisplacerandthepowerpistonarepusheddownintotheirlowestpositions.Thepistonwillstaytherewhilethedisplacerrisesandpushesthegasthroughtheheatingpipes,regeneratorandcoolerintothecoldspace_andwearebackwherewestarted.Words:Diagram：图表Position：位置Stirling:斯特林（咅译）Displacer

7、:置换器Piston:活塞Regenerator:蓄热器Cooler：冷却器Expand：膨胀As：随之hestenergy：热能mechanicalenergy：机械能译文：置换器型斯特林发动机工作循环如下所示：A.置换器在最高位，动力活塞在最低位。所有的工作气体在冷空间；B.置换器不动，动力活塞上升并挤压冷空间的气体；C.动力活塞到达最高位，置换器下移，推动气体经过冷却器、蓄热器、和加热管进入热空间；D.热2膨胀，’閱能转'变成机械能，随Z动力活塞和置换器到达最低位。动力活塞不动，置换器上升推动气体经过加热管、蓄热器和冷却器进入冷空间回到起点。三、G

8、rammar概论（一）什么是翻译？机械工程英语翻译的困难主要存在于正确理解原文的